<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/merchant-home' }"
        >首页</el-breadcrumb-item
      >
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 提示区域 -->
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon
        :closable="false"
      >
      </el-alert>
      <!-- 步骤条区域 -->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        align-center
        finish-status="success"
      >
        <el-step title="基本信息"></el-step>
        <!-- <el-step title="商品参数"></el-step>
              <el-step title="商品属性"></el-step> -->
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tab栏 -->
      <el-form
        :model="addFrom"
        :rules="addFromRules"
        ref="addFromRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          v-model="activeIndex"
          :tab-position="'left'"
          :before-leave="beforeTabLeave"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="name">
              <el-input v-model="addFrom.name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="price">
              <el-input type="number" v-model="addFrom.price"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="weight">
              <el-input type="number" v-model="addFrom.weight"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="number">
              <el-input type="number" v-model="addFrom.number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="cate">
              <el-cascader
                v-model="addFrom.cateId"
                :options="catelist"
                :props="{
                  expandTrigger: 'hover',
                  label: 'name',
                  value: 'id',
                  children: 'children',
                }"
                @change="handleChange"
              >
              </el-cascader>
            </el-form-item>
          </el-tab-pane>
          <!-- <el-tab-pane label="商品参数" name="1">商品参数</el-tab-pane>
              <el-tab-pane label="商品属性" name="2">商品属性</el-tab-pane> -->
          <el-tab-pane label="商品图片" name="1">
            <!-- action: 图片要上传到的后台API地址 -->
            <el-upload
              action="http://localhost:8888/product/upload"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
              accept="image/jpeg,image/jpg,image/png"
            >
              <el-button size="small" type="primary">点击上传</el-button>
              <div slot="tip" class="el-upload__tip">
                只能上传jpg/png文件，且不超过5M
              </div>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="2">
            <!-- 富文本编辑器 -->
            <quill-editor v-model="addFrom.description"></quill-editor>
            <!-- 添加商品的按钮 -->
            <el-button type="primary" class="btuAdd" @click="add"
              >添加商品</el-button
            >
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <el-image :src="previewPath"></el-image>
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'

export default {
  data() {
    return {
      activeIndex: 0,
      // 添加商品的表单数据对象
      addFrom: {
        merchantId: null,
        name: '',
        price: 0,
        weight: 0,
        number: 0,
        // 商品所属分类数组
        cateId: [],
        // 图片的数组
        picture: [],
        // 商品的详情描述
        description: ''
      },
      addFromRules: {
        name: [{ required: true, message: '请输入商品名称', trigger: 'blur' }],
        price: [{ required: true, message: '请输入商品价格', trigger: 'blur' }],
        weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        cateId: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      // 商品分类列表
      catelist: [],
      // 上传图片的URL地址
      uploadURL: 'http://localhost:8888/upload',
      // 图片上传组件的headers请求头
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      previewPath: '',
      previewVisible: false
    }
  },
  created() {
    this.getCateList()
    this.addFrom.merchantId = window.localStorage.getItem('merchantID')
  },
  methods: {
    // 获取商品分类数据
    async getCateList() {
      const { data: res } = await this.$axios.get(
        '/product-categories/selectProduct',
        { params: { type: 2 } }
      )
      if (res.code !== 200) {
        return this.$message.error('获取商品分类数据失败')
      }
      this.catelist = res.data.prolist
    },
    // 级联选择器选中选项变化，会触发这个函数
    handleChange() {
      console.log(this.addFrom.cateId)
      if (this.addFrom.cateId.length !== 2) {
        this.addFrom.cateId = []
      }
    },
    beforeTabLeave(activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addFrom.cateId.length !== 2) {
        this.$message.error('请先选择商品分类')
        return false
      }
    },
    // 处理图片预览效果
    handlePreview(file) {
      console.log(file)
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 处理移除图片的操作
    handleRemove(file) {
      console.log(file)
      // 获取图片的临时路径
      const filePath = file.response.data.tmp_path
      // 从pics数组中，找到这个图片对应的索引值
      const i = this.addFrom.picture.findIndex((x) => x.picture === filePath)
      // 调用splice方法，把图片信息对象，从pics数组中移除
      this.addFrom.picture.splice(i, 1)
      console.log(this.addFrom)
    },
    // 监听图片上传成功的事件
    handleSuccess(response, file, fileList) {
      console.log(file + '图片数据： ' + response)
      // 拼接得到一个图片信息对象
      const picInfo = {
        picture: response.data.tmp_path,
        pictureUrl: response.data.url
      }
      this.addFrom.picture.push(picInfo)
      console.log(this.addFrom)
    },
    add() {
      this.$refs.addFromRef.validate(async (valid) => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项')
        }
        const form = _.cloneDeep(this.addFrom)
        // 执行添加的业务逻辑
        form.cateId = this.addFrom.cateId[1]
        console.log(form)
        const { data: res } = await this.$axios.post('/product/add', form)
        console.log(res)
        if (res.code !== 200) {
          return this.$message.error('添加失败')
        }
        this.$message.success('添加成功')
        this.$router.push('/merchant-home/product')
      })
    }
  }
}
</script>

<style lang="less" scoped>
.btuAdd {
  margin-top: 15px;
}
</style>
